Policy on Intellectual Property Right (IPR)
Annex� 1� Hierarchy of compatible multichannel sound systems
for broadcasting and recording
Annex� 2� Basic requirements
Annex� 3� Compatibility
�1���� Backward compatibility with
existing receivers
�2���� Downward compatibility with
low-cost receivers
Annex� 4� Downward mixing of multichannel audio signals
�1���� 3/2 source signals
Annex� 5� Upwards conversion
�1���� Frontal channels
�2���� Surround channels
�3���� Data channel
Annex� 6� Additional data
Annex� 7� Low frequency effects channel (LFE)
Appendix 1 to Annex 7 (informative)� Usage of the low
frequency effects channel (LFE)
�1���� Introduction
What is a subwoofer?
What is the LFE?
�2���� Using a subwoofer to extend
frequency range
�3���� Using the LFE channel to make
an impact
�4���� Connecting the LFE to the
subwoofer
�5���� Down-mix of broadcast surround
sound
�6���� Dolby E LFE and Dolby AC-3 LFE
7 �����Technical requirements
Annex� 8� Compatibility matrixing and downward mixing